Katsantonis, Menelaos, and Ioannis Mavridis. “Evaluation of HackLearn COFELET Game User Experience for Cybersecurity Education”. International Journal of Serious Games 8, no. 3 (September 17, 2021): 3–24. Accessed October 19, 2021. https://journal.seriousgamessociety.org/index.php/IJSG/article/view/437.